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Stars
Beginning of paper
Magnitudes
The magnitude scale was invented by an ancient Greek astronomer named Hipparchus
in about 150 BC He ranked the he could see in terms of their brightness,
with 1 representing the brightest down to 6 representing the faintest. Modern
astronomy has extended this system to stars brighter than Hipparchus' 1st
magnitude stars and ones much, ....
Middle of paper
.... magnitude +16 or
fainter. There are thus (a very few) stars more than 100 times brighter than
Sirius, while hardly any are known fainter than Wolf 356.
Star, large celestial body composed of gravitationally contained hot gases
emitting electromagnetic radiation, especially light, as a result of nuclear
reactions inside the star. The sun is a star.... |
| Word count: 817 |
Page count: 3 |
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